Display screen or portion thereof with a transitional graphical user interface for annotating radioanatomy images



FIG. 1 is a front view of a display screen or portion thereof with a transitional graphical user interface for annotating radioanatomy images.

FIG. 2 is a second image thereof.

FIG. 3 is a third image thereof.

FIG. 4 is a fourth image thereof; and,

FIG. 5 is a fifth image thereof.

The process or period in which an image transitional to another image forms no part of the claimed design.

The perimeter dashed box forming a frame around the transitional graphical user interface are for the purpose of illustrating a display screen or a portion thereof that forms no part of the claimed design. The other broken lines within the graphical user interface represent portions of the graphical user interface. None of the aforementioned broken lines form part of the of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a transitional graphical user interface for annotating radioanatomy images, as shown and described. 